The engine compartment is the same, but the crossmember the engine sits on is NOT. You will need a Hemi K member or some type of conversion engine mount, the problem w the conversion mounts is finding headers to work with them.

Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451